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    <Description xmlns="http://jabber.org/protocol/pubsub#event">
      Special Notice from the AAVSO
    </Description>
    <Who xmlns="http://jabber.org/protocol/pubsub#event">
      <AuthorIVORN>
        ivo://archive.aavso/
      </AuthorIVORN>
      <Author>
        <shortName>
          AAVSO
        </shortName>
        <contactName>
          Richard C.S. Kinne
        </contactName>
        <contactEmail>
          rkinne at aavso.org
        </contactEmail>
      </Author>
      <Date>
        2011-09-14T15:38:00
      </Date>
    </Who>
    <Reference xmlns="http://jabber.org/protocol/pubsub#event" uri="http://www.aavso.org/publications_files/specialnotice/255.shtml" />
    <What xmlns="http://jabber.org/protocol/pubsub#event">
      <Param name="aavsoNumber" value="255" />
      <Param name="event" value="AAVSO Special Notice #255:  Cataclysmic Variable in Draco = PNV J18422792+4837425" />
      <Param ucd="meta.link.url" name="link" value="http://www.aavso.org/aavso-special-notice-255">
        <Description>
          Link back to the AAVSO web page
        </Description>
      </Param>
      <Param ucd="meta.id" name="objectName" value="PNV J18422792+4837425">
        <Description>
          Standard name for the astronomical object
        </Description>
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      <Param dataType="float" ucd="phot.mag" name="magnitude" value="11.8">
        <Description>
          Approximate magnitude of the object.
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          IAU CBAT Central Bureau Electronic Telegram 2818 (Daniel W. E. 
Green, ed.) announces the discovery by Hideo Nishimura, Miyawaki, 
Kakegawa, Shizuoka-ken, Japan, of a cataclysmic variable in Draco
on 2011 Sept. 5.529 UT at magnitude 11.8 (reported by S. Nakano, 
Sumoto, Japan). The variable was designated PNV J18422792+4837425 
when posted on the Central Bureau's TOCP webpage. 

A spectrum obtained by Ulisse Munari, Istituto Nazionale di 
Astrofisica, Padova Astronomical Observatory, on 2011 September  
6.841 UT with the Asiago Astrophysical Observatory 1.22-m telescope 
is typical of a cataclysmic variable near maximum. 

Munari also reports that nothing was visible at the location of 
the object on the Palomar Sky Survey. This suggests the possibility 
that it may be a WZ Sge-type variable, based on its large amplitude.
CCD time series are requested to determine the nature of this 
object and to search for superhumps. Visual observations are also 
welcome.

Over 800 observations of PNV J18422792+4837425 have been submitted 
to the AAVSO International Database to date, by Richard Sabo, 
Bozeman, MT, and Joseph Ulowetz, Northbrook, IL; the most recent 
one is from 2011 September 13.2285 UT at magnitude 12.621 CV by 
Ulowetz.

Coordinates: RA 18 42 27.92  Dec. +48 37 42.5 (2000.0) 

Charts for PNV J18422792+4837425 (000-BKD-643) may be plotted 
using VSP (http://www.aavso.org/vsp). To accomodate the location of
the comparison star sequence relative to the variable, it is 
recommended that observers choose a D-scale chart and a limiting 
magnitude of 16.0.

Until an official name is assigned by the GCVS team, please report 
observations of this object to the AAVSO International Database
as PNV J18422792+4837425. 

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.
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            <Time unit="s">
              <TimeInstant>
                <ISOTime>
                  2011-09-14T15:38:00
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              <Name1>
                RA
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              <Name2>
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                <C1>
                  280.61633333333
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                <C2>
                  +48.628472222222
                </C2>
              </Value2>
              <Error2Radius>
                0.0
              </Error2Radius>
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